Business Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Segment Reporting Information [Line Items]
Total net sales	$ 680.5	$ 646.2
Total operating income	133.4	111.1
Interest expense	6.4	11.6
Other (income) expense, net	(12.5)	2.1
Income before income taxes	139.5	97.4
Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	507.0	485.2
Total operating income	127.5	122.9
Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	173.5	161.0
Total operating income	17.5	1.7
Corporate
Segment Reporting Information [Line Items]
Total operating income	(11.6)	(13.5)
Toric lens | Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	162.3	155.1
Multifocal lens | Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	57.7	51.8
Single-use sphere lens | Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	146.0	138.1
Non single-use sphere, other | Operating Segments | CooperVision
Segment Reporting Information [Line Items]
Total net sales	141.0	140.2
Office and surgical products | Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	103.5	98.5
Fertility | Operating Segments | CooperSurgical
Segment Reporting Information [Line Items]
Total net sales	$ 70.0	$ 62.5